20102320221 has 8 divisors (see below), whose sum is σ = 26812918944. Its totient is φ = 13396634160.

The previous prime is 20102320219. The next prime is 20102320237. The reversal of 20102320221 is 12202320102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102320221 - 2¹ = 20102320219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102320291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218606 + ... + 1234991.

It is an arithmetic number, because the mean of its divisors is an integer number (3351614868).

Almost surely, 2^20102320221 is an apocalyptic number.

It is an amenable number.

20102320221 is a deficient number, since it is larger than the sum of its proper divisors (6710598723).

20102320221 is a wasteful number, since it uses less digits than its factorization.

20102320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456331.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20102320221 its reverse (12202320102), we get a palindrome (32304640323).

The spelling of 20102320221 in words is "twenty billion, one hundred two million, three hundred twenty thousand, two hundred twenty-one".